Basic steps:
  1. Answer one or more questions on right by clicking checkboxes. It's okay to check multiple boxes. Then click any 'search' button.
  2. Results appear on left. Click the 'simplify' button to get more questions.
  3. Repeat steps 1 and 2, narrowing down the possibilities.
  4. A 'COMPARE IMAGES' link appears on left when under 100 kinds match. Use this to compare kinds.
Click Restart to search again.
Click Guides to list other guides.
Click here if you're a new user.

Discover Life 25 kinds match:
Hylaeus affinis  [popup] male
Hylaeus annulatus  [popup] male
Hylaeus basalis  [popup] male
Hylaeus confluens  [popup] male
Hylaeus fedorica  [popup] male
Hylaeus flammipes  [popup] male
Hylaeus floridanus  [popup] male
Hylaeus formosus  [popup] male
Hylaeus georgicus  [popup] male
Hylaeus graenicheri  [popup] male
Hylaeus hyalinatus  [popup] male
Hylaeus illinoisensis  [popup] male
Hylaeus leptocephalus  [popup] male
Hylaeus mesillae  [popup] male
Hylaeus modestus  [popup] male
Hylaeus nelumbonis  [popup] male
Hylaeus ornatus  [popup] male
Hylaeus punctatus  [popup] male
Hylaeus rudbeckiae  [popup] male
Hylaeus saniculae  [popup] male
Hylaeus schwarzii  [popup] male
Hylaeus sp. A  [popup] male
Hylaeus sparsus  [popup] male
Hylaeus verticalis  [popup] male
Hylaeus volusiensis  [popup] male


REMAINING (number with state)
Abdomen, T1, color
 All black or black-brown (24)
 All or mostly AMBER colored, distinctly lighter than the rest of the abdomen (4)
H. annulatus, H. fedorica, H. rudbeckiae - Combination of characters
 . annulatus - At the level of the antennae the yellow facial marks are broad, wider than the hole or fossae of the antennae bases, these marks then immediately contract to narrow lines that curve in towards each other above the antennal bases, the ends are roughly squared off or only indeterminantly rounded - In direct comparison this species is larger than H. rudbeckiae and H. fedorica and the scape about 1.5 times the width of flagella segments or slightly greater (1)
 H. fedorica - The yellow facial marks stop near the top of the antennae bases, the marks narrow quickly to a set of horns with rounded ends - The scape only SLIGHTLY wider than the flagella segments (1)
 H. rudbeckiae - At the level of the antennae the yellow facial marks are pinched down to narrow necks, these necks far narrower than the hole or fossae of the antennae bases, these marks then expand above the antennae to become oblong, tear-drop shapes with clearly rounded throughout - The scape is smaller than H. annulatus, but only slightly, and clearly larger and expanded when compared to H. fedorica (1)
H. fedorica vs H. mesillae
 H. fedorica - Yellow markings between clypeus and eyes curving around antennal socket, but NOT extending past the rear margin of the socket - Pits on lower half of scutum with interpit distances GREATER than, or at least equal to 1 pit diameter (1)
 H. mesillae - Yellow markings between clypeus and eyes curving around antennal socket and extending PAST the rear margin of the socket - Pits on lower half of scutum with interpit distances clearly LESS than 1 pit diameter (1)
H. flammipes vs all
 All Other Species (24)
 H. flammipes - RARE bee, only known from the female, see species account (1)
H. hyalinatus and H. punctatus vs other Hylaeus species - Boundary between front and side of mesepisternum
 Others - Boundary between the narrow front of the mesepisternum, found below the pronotum, and the side of the mesepisternum, found below the attachment of the front wing, smooth, rounded over, without a sharp ridge or carina, defining the two 90 degree faces (23)
 H. hyalinatus and H. punctatus - Boundary between the narrow front of the mesepisternum, found below the pronotum, and the side of the mesepisternum, found below the attachment of the front wing, sharp, having a raised line or carina between the two faces - Some mesepisternum pits touching one another and spaces inbetween clearly shining - Has yellow mark on tegula similar to affinis - Some antennal segments clearly longer than wide (2)
H. hyalinatus vs H. punctatus
 H. hyalinatus - Supraclypeal area pale yellow or ivory - Lateral face marks, found on either side of the clypeus, clearly extend above the antennal BASE - S8 often projects behind the tip of the abdomen as a large round, transparent disc, this disc attached to the base on a long narrow stalk (1)
 H. punctatus - Supraclypeal area usually without any marks or with marks only on the lower third - Lateral face marks, found on either side of the clypeus, extend little, if at all, above the antennal BASE - S8 often projects behind the tip of the abdomen as a large round, transparent disc, this disc broadly attached to the base by about one third of the width of the disc (1)
H. mesillae vs H. verticalis - Shape of the yellow marking between the clypeus and the eye above the level of the antennae
 H. mesillae - Markings follow the outer edge of the antennal socket, shaped as an upside down rain drop connected to the rest of the marking by a THICK stalk - Note this common species was formerly known as H. cressonii (1)
 H. verticalis - Markings follow the outer edge of the antennal socket as a finger curving around the socket, area just behind the sockets smooth, shiny, and dark brown in color, distinct from the surrounding area, this brown area is generally the same area that is filled in H. mesillae by the thick rain drop mentioned in its account (1)
H. mesillae, H. rudbeckiae, H. floridanus, H. georgicus, H. illinoisensis, and H. modestus - Shape of the yellow marking between the clypeus and the eye above the level of the antennae
 Others - Markings follow the inner margin of the eye and either taper off to a SHARP end or come to a BLUNTLY rounded or squared off end (5)
 H. mesillae - Markings follow the outer edge of the antennal socket, NOT the inner margin of eye, shaped as an upside down rain drop connected to the rest of the marking by a THICK stalk (1)
 H. rudbeckiae - Markings follow the outer edge of the antennal socket, NOT the inner margin of eye, shaped as an upside down rain drop connected to the rest of the marking by a NARROW stalk (1)
H. modestus vs H. schwarzii
 H. modestus - Base of mandible often, but not always, partially yellow - Clypeus and adjacent yellowed paraocular areas only slightly pitted, if at all, more often appearing finely tessellated - Scutum densely pitted, although most pits have clear interspaces present between each other - Pitting on T1 obvious and relatively uniformly distributed throughout the surface, at most with a slight decrease in pit density centrally (1)
 H. schwarzii - Base of mandible all black - Clypeus and adjacent yellowed paraocular areas very roughly and irregularly pitted, making the surface integument appear bumpy or craggy - Scutum extremely densely pitted, with a majority of the pits touching each other, such that their interspaces are non-existent or very nearly so - Pitting on T1 obvious, but with the latitudinal middle of the segment either with significantly sparser pits or entirely unpitted, be careful as this area may be very narrow (1)
H. modestus vs H. verticalis - Shape of the yellow marking between the clypeus and the eye above the level of the antennae
 H. modestus - Markings follow the inner margin of the eye, ending either sharply or bluntly, but always nearer the eye than the antennal socket, area just behind the sockets pitted or striated and black (1)
 H. verticalis - Markings follow the outer edge of the antennal socket as a finger curving around the socket, area just behind the sockets smooth, shiny, and dark brown in color, distinct from the surrounding area (1)
H. nelumbonis vs H. schwarzii - Abdomen color
 H. nelumbonis - T1 and T2 almost always at least partially red, this red color can be quite dark in some specimens so look closely (1)
 H. schwarzii - Abdomen completely black, no hint of red anywhere (1)
H. nelumbonis vs H. verticalis - Abdomen color
 H. nelumbonis - T1 and T2 almost always at least partially red, this red color can be quite dark in some specimens so look closely (1)
 H. verticalis - Abdomen completely black, no hint of red anywhere (1)
H. saniculae vs all, face, area between the antennal sockets and the eyes
 All others - Normal, LACKING a depression, area may be pitted or unpitted and will most likely be flat, though it may be slightly raised (23)
 H. saniculae - With a conspicuous oval DEPRESSION about twice the size of the each ocellus (1)
H. schwarzii vs H. verticalis
 H. schwarzii - Mandibles all black - The yellow paraocular markings of the face along the inner edge of the compound eye extend up past the antennae, but remain along the inner edge and DO NOT curl around the antennal bases - Mesepisternum coarsely and closely pitted, with nearly all these large pits touching each other - Scutum extremely densely pitted, with a majority of the pits touching each other, such that their interspaces are non-existent or very nearly so, with the pits of the posterior half of the scutum with pit interspaces usually less than half their pit diameters (1)
 H. verticalis - Mandibles with extensive basal yellow markings, nearly always - The yellow markings of the face along the inner edge of the compound eye extend up past the antennae, then curving away from the inner edge of the eye and toward the antennal bases - Mesepisternum with relatively smaller pits, which have clear pit interspaces between them and virtually no pits touching - Scutum only slightly densely pitted, with relatively few pits touching each other, and some pit interspaces nearly equal to the pit diameters in the posterior half of the scutum (1)
H. sp. A, H. affinis, H. illinoisensis, H. modestus - Note the color patterns listed below appear to work MOST of the time, but be careful for the odd specimen without the markings
 H. affinis - Tegula with a yellow spot or mark and the smaller tegula-like plate that sits underneath the tegula with a yellow band along its leading edge - Scape yellow -gen closed - UNIQUE, scape yellow - Pitting on T1 about the same as that on T2 or a bit less - T1 dulled by fine lines - Pits on T1 spaced 1-2 pits apart, on average T1 same as T2 - UNIQUE, S3 and to a lesser extent S4 have to 2 very low-rising mounds in the center of the segment, while shallow these are clearly visible - Dorsal crests close, not forming a pocket (1)
 H. illinoisensis - Tegula dark - Scape black -Gen closed - Scape black - UNIQUE, Pit density on T1 MUCH less than that on T2 - T1 clearly glossy - UNIQUE, Pits on T1 spaced 5 pits apart, on average, often appearing absent in the center of the segment - S3 and S4 completely flat - Dorsal crests close, not forming a pocket (1)
 H. modestus - Tegula with a yellow spot or mark and the smaller tegula-like plate that sits underneath the tegula with a yellow band along its leading edge- Gen closed - Scape black - Scape black - Pitting on T1 about the same as that on T2 or a bit less - T1 dulled by fine lines - Pits on T1 spaced 1-2 pits apart, on average - S3 and S4 completely flat - Dorsal crests close, not forming a pocket (1)
 H. sp. A - A currently undescribed species - Tegula dark - Scape black - Pitting on T1 about the same or a bit less than that on T2 - T1 sometimes reflective and glossy sometimes dulled by fine lines - Pits on T1 spaced 1-4 pits apart, on average - S3 and S4 completely flat - UNIQUE, the penis valves of the genitalia have the dorsal crests widely separated, with the space between them nearly equaling the width of the gonocoxite forming a pocket or cavity between them (1)
H. sparsus vs others - Front coxa, shape or profile of the outer edge when viewing its wide, flat face
 Others - The profile smooth, straight or only gently curved (24)
 H. sparsus - The profile has a sharp, nearly spinose, angle in its outline (1)
H. volusiensis, H. nelumbonis, H. ornatus - Combination of propodeal characters
 H. nelumbonis and H. ornatus - Oblique carina on propodeum very pronounced - Comparatively, rear vertical face large and pronounced - Longitudinal length of horizontal face normal, that is, the basal half of the propodeal triangle being on the horizontal face and tip half on the vertical face - Face and thorax markings or H. ornatus cleary yellow and pronotal collar with extensive yellow markings - Face and thorax markings of H. nelumbonis light yellow to ivory, no markings on the collar (2)
 H. volusiensis - Oblique carina on propodeum vague - Rear vertical face comparatively small, blending in with the basal horizontal face over a large curved transition rather than having a sharp demarcation between the two faces- Rear horizontal face longitudinally long, the propodeal triangle existing almost completely on the horizontal face while only very apex of the triangle on the vertical face - Face and thorax markings ivory, pronotal collar with two, small widely separated ivory marks (1)
Head, antennae, greatest width of scape vs greatest width of flagella
 2. SOMEWHAT expanded, wider than flagella, but only slightly, LESS than 1.5X wider (18)
 1. NORMAL, not expanded, less than or approximately equal in width (16)
 3. MODERATELY expanded, about 1.5X wider (7)
 4. Greatly EXPANDED, 3X to 5X wider (2)
Head, antennae, length of the 1st vs the 2nd flagella segment
 GREATER than half (19)
 About HALF, sometimes less (9)
Head, antennae, scape, overall color
 All DARK (15)
 Dark with some YELLOW or IVORY (14)
Head, clypeus, surface appearance
 1. Finely PEBBLED throughout, likely with a few scattered indistinct shallow pits (15)
 2. Pits OBVIOUS throughout, but only MODERATELY dense, pits ON AVERAGE separated by MORE than ONE pit diameter, surface between pits is finely pebbled (14)
 3. Pits OBVIOUS and DENSE, on average separated by NO MORE than ONE pit diameter, surface between pits may be smooth or rough (6)
Head, labrum, color
 Black (21)
 YELLOW, at least in part (5)
 IVORY, at least in part (1)
Head, length of eye vs the greatest length of the face, measured from back of head to rim of clypeus - Precise measurements will be necessary
 Temp - Ignore this button (24)
 2. Eye is GREATER than 75% of face length (21)
 1. Eye is LESS than 75% of face length (15)
Head, mandibles, color
 Black (19)
 YELLOW, at least in part (9)
 IVORY, at least in part (3)
Head, pale facial markings
 Largely remaining in contact with the eye margin, IF leaving eye margin then NOT curving towards antennal bases (10)
 Turning AWAY from eye margin, curving towards, or partially embracing the antennal bases (5)
Length of body, measured in mm
 5mm (19)
 4mm (15)
 6mm (14)
 7mm (13)
 3mm (9)
 8mm (6)
 10mm (1)
 9mm (1)
State or province where bee was collected
 NJ (19)
 DC (18)
 DE (18)
 PA (18)
 FL (17)
 MA (17)
 MD (17)
 NY (17)
 VA (17)
 CT (16)
 MI (16)
 NC (16)
 Ontario (16)
 RI (16)
 SC (15)
 WI (15)
 WV (15)
 GA (14)
 IL (14)
 IN (14)
 OH (14)
 TN (14)
 AL (13)
 KY (13)
 ME (13)
 MS (12)
 NH (12)
 VT (12)
 Quebec (10)
 Nova Scotia (9)
 New Brunswick (8)
 SD (3)
 Newfoundland and Labrador (2)
 Prince Edward Island (2)
Subgenus
 Prosopis (9)
 Hylaeus (7)
 Hylaeana (2)
 Paraprosopis (2)
 Spatulariella (2)
 Cephalylaeus (1)
 Metziella (1)
Thorax, pronotal collar, color
 All black or black-brown (19)
 With a pair of ivory or yellow markings (17)
Thorax, scutum, lower half and sides, density of pits
 Pits are mostly essentially TOUCHING one another (18)
 Pits mostly NOT touching (10)
Thorax, scutum, size of pits
 Small, no wider than the parapsidal line (16)
 Medium to large, between 1.5 and 2 times wider than the parapsidal line (9)
Thorax, scutum, surface appearance
 Lines between pits essentially smooth and evenly raised around pits, NOT craggy (22)
 Lines between pits EXTREMELY ROUGH, irregularly raised, and CRAGGY (6)